Briquetting composition



Patented Apr. 14, 1931 UNITED STATES PATENT OFFICE LEO L. snvrrson AND WILLIAM H. BROWN, or BRYN MAWR, wAsnmeroN BRIQUETTING YN'o Drawing. Application filed April 18,

Our invention relates to briquetting compositions, and more especially to compositions for manufacturing briquettes for fuel use. Certain objects of the invention are to provide a briquette that is firm and clean and will not crumble or chip off to cause dirt and waste; which is comparatively simple and inexpensive to manufacture; which will retain its shape until completely consumed; which is adapted for briquetting lignite as well as hard coals; and which is well suited for transportation by reason of its durable qualities.

lVith the above and other objects in view which will appear as the description proseeds, the invention consists of the novel combination of ingredients as hereinafter described and claimed.

For forming the bond or binder in carrying out our process we use three ingredients in substantially equal parts, namely; gilsonite, asphalt and fuel oil with an asphalt base. The percentages of said ingredients may be varied more or less in accordance with the quality of material briquetted and also in accordance with the quality of the ingredients themselves.

In view of the fact that asphalt melts at from ninety to one hundred degrees Fahrenheit and therefore has a tendency for causing the briquettes to crumble or disintegrate before they are fully consumed, We raise the melting point of the mixture by using gilsonite which melts at from two hundred and seventy-five to three hundred degrees Fahrenheit and thus form a briquette that retains its shape until completely burned.

We use fuel oil in our mixture for the reason that the oil in combination with the other ingredients causes the briquettes to coke when burning to a suflicient degree for forming a very strong article of fuel that will retain its shape when burning; and also for the reason that the oil results in the pro duction of a clean briquette that will not crumble and cause waste and dirtprior to burning.

For setting the bond we use substantially two parts of yellow dextrin and one part of sulphur thus forming a sulphurated dextrin.

comrosrmon V 1923. Seria1N0.271,104.

The dextrin counteracts the poisonous sulphur fumes and renders the fumes harmless.

The percentage of dextrin and sulphur may be varied in accordance with the quality of the combustible material to be briquetted.

In briquetting some coals we have found it desirable to add to the coal substantially ten per cent of finely ground coking coal or coke. lVe also sometimes use about one per cent of potassium carbonate in the coal which adds materially to the burning qualities of the briquettes.

In carrying out our process of manufacturing briquettes We mix the sulphurated dextrin with finely ground coal, coke or other combustible material and the mixture is well heated. The bond base comprising gilsonite, asphalt and fuel oil is likewise heated and then added to the heated mixture of sulphurated dextrin and combustible material. We use substantially five pounds of the bond base and two pounds of the sulphurated dextrin to every one hundred pounds of combustible material.

The entire mass is thoroughly mixed together and is then pressed into briquettes preferably in a briquetting machine at a pressure of from five hundred to three thousand pounds per square inch. The briquettes are then ejected from the press and are either cooled with water or allowed to cool in the open air for about twenty-four hours when they will be ready for use.

Having thus described our invention, what we claim and desire to secure by Letters Patent is:

1. A briquetting composition comprising gilsonite, asphalt, fuel oil, dextrin, sulphur, and combustible material.

2. A briquetting composition consisting of the mixture of gilsonite, asphalt and fuel oil in substantially equal parts to form a bond base, the mixture ofsubstantially two parts of dextrin and one part of sulphur to form a setting for the bond base, a mixture comprising two pounds of the setting and one hundred pounds of finely ground combustihis material, and the last named mixture compounded with five pounds of the bond base.

3. A briquetting composition comprising a mixture of gilsonite, asphalt and fuel oil in. substantially equal portions to form a bond base, the mixture of substantially two parts of yellow dextrin and one part of sulphur to form a setting for thebond base,substanti ally ten pounds of finely ground coking coaland' one pound of potassium carbonate with one hundred pounds of finely ground combusti? ble material, to .form a Combustible mixture,

a mixture of two pounds of'the said setting 7 combined with the said combustiblom itllre,

and this last named mixture compounded with substantially five poundsof; the: said,

bond base. 7 y 7 In witness whereof, we hereunto subscribe Our names this 13th dayofApril, AJD Q1928,

LE "slurs-0 WILLIAM BROWN. 

